Which type of fumes should be indicated by a respiratory protection signal colored pink?

The correct indication for a respiratory protection signal colored pink is for organic vapors and acid gases, which is important for proper identification of the hazards present in the environment. When dealing with toxic substances, specific colors are used to ensure that individuals can quickly recognize the type of respiratory protection needed. Pink signals specifically indicate that respirators designed to handle organic vapors and acid gases are required to protect against those hazards.

In contexts such as this, choosing the right protective gear based on the specific fumes one may encounter is crucial for ensuring safety and compliance with health regulations. The other options represent different types of hazards that correspond to different colors. For instance, dust and welding fumes typically do not require the same type of respiratory protection that is suited for toxic vapors, highlighting the need for accuracy in selecting protective equipment based on specific color codes.